Non-covalent doping of graphitic carbon nitride with ultrathin graphene oxide and molybdenum disulfide nanosheets : An effective binary heterojunction photocatalyst under visible light irradiation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • S. W. Hu
  • L. W. Yang
  • Y. Tian
  • X. L. Wei
  • J. W. Ding
  • J. X. Zhong

Detail(s)

Original languageEnglish
Pages (from-to)42-49
Journal / PublicationJournal of Colloid and Interface Science
Volume431
Online published12 Jun 2014
Publication statusPublished - 1 Oct 2014

Abstract

A proof of concept integrating binary p-n heterojunctions into a semiconductor hybrid photocatalyst is demonstrated by non-covalent doping of graphite-like carbon nitride (g-C3N4) with ultrathin GO and MoS2 nanosheets using a facile sonochemical method. In this unique ternary hybrid, the layered MoS2 and GO nanosheets with a large surface area enhance light absorption to generate more photoelectrons. On account of the coupling between MoS2 and GO with g-C3N4, the ternary hybrid possesses binary p-n heterojunctions at the g-C3N4/MoS2 and g-C3N4/GO interfaces. The space charge layers created by the p-n heterojunctions not only enhance photogeneration, but also promote charge separation and transfer of electron-hole pairs. In addition, the ultrathin MoS2 and GO with high mobility act as electron mediators to facilitate separation of photogenerated electron-hole pairs at each p-n heterojunction. As a result, the ternary hybrid photocatalyst exhibits improved photoelectrochemical and photocatalytic activity under visible light irradiation compared to other reference materials. The results provide new insights into the large-scale production of semiconductor photocatalysts. © 2014 Elsevier Inc.

Research Area(s)

  • Graphite-like carbon nitride, Heterojunction, Nanosheets, Non-covalent doping, Photocatalysis

Citation Format(s)

Non-covalent doping of graphitic carbon nitride with ultrathin graphene oxide and molybdenum disulfide nanosheets : An effective binary heterojunction photocatalyst under visible light irradiation. / Hu, S. W.; Yang, L. W.; Tian, Y.; Wei, X. L.; Ding, J. W.; Zhong, J. X.; Chu, Paul K.

In: Journal of Colloid and Interface Science, Vol. 431, 01.10.2014, p. 42-49.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review